Forgot $ (#137)

.github/workflows/build-unified.yml

@@ -119,7 +119,7 @@ jobs:
           IMAGE_TAG=$(echo "${SERVER_BRANCH}" | sed "s#/#-#g")  # slash safe branch name
           if [[ "${IMAGE_TAG}" == "master" ]]; then
             IMAGE_TAG=dev
-          elif [[ ("{IMAGE_TAG}" == "rc") || ("${IMAGE_TAG}" == "hotfix-rc") ]]; then
+          elif [[ ("${IMAGE_TAG}" == "rc") || ("${IMAGE_TAG}" == "hotfix-rc") ]]; then
             IMAGE_TAG=beta
           fi